python圣诞树3D粒子

以下是一个使用Python实现的3D圣诞树粒子效果的例子：

import turtle
import random

# 设置画笔
t = turtle.Turtle()
t.speed(0)
turtle.bgcolor("black")
colors = ["red", "yellow", "green", "white", "blue", "orange", "purple", "pink", "brown", "gray", "cyan"]

# 定义函数
def draw_tree(d, s):
    if d <= 0:
        return
    t.pencolor(colors[random.randint(0, len(colors)-1)])
    t.forward(s)
    t.right(120)
    draw_tree(d-1, s*0.8)
    t.right(120)
    draw_tree(d-1, s*0.8)
    t.right(120)
    draw_tree(d-1, s*0.8)
    t.right(120)
    t.backward(s)

# 绘制圣诞树
t.up()
t.goto(0, -200)
t.down()
draw_tree(7, 100)

# 绘制圣诞装饰品
for i in range(200):
    a = 200 - 400 * random.random()
    b = 10 - 20 * random.random()
    t.up()
    t.forward(b)
    t.left(90)
    t.forward(a)
    t.down()
    if random.randint(0, 1) == 0:
        t.color('tomato')
    else:
        t.color('wheat')
    t.circle(2)
    t.up()
    t.backward(a)
    t.right(90)
    t.backward(b)

# 显示结果
turtle.done()